<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">
        首页
      </el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <div slot="header">
        <el-button
          type="primary"
          @click="addDialogVisible = true"
        >
          添加角色
        </el-button>
      </div>
      <!-- 角色列表 -->
      <div>
        <el-table
          :data="rolesList"
          border
          stripe
        >
          <el-table-column
            type="expand"
          >
            <template v-slot="scope">
              <el-row
                v-for="(item1, i1) in scope.row.children"
                :key="item1.id"
                :class="['bdbottom', i1 ===0 ? 'bdtop' : '', 'vcenter']"
              >
                <el-col :span="5">
                  <el-tag
                    type="primary"
                    closable
                    @close="removeRightById(scope.row, item1.id)"
                  >
                    {{ item1.authName }}
                  </el-tag>
                  <i class="el-icon-caret-right" />
                </el-col>
                <el-col :span="19">
                  <el-row
                    v-for="(item2, i2) in item1.children"
                    :key="item2.id"
                    :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  >
                    <el-col :span="6">
                      <el-tag
                        type="success"
                        closable
                        @close="removeRightById(scope.row, item2.id)"
                      >
                        {{ item2.authName }}
                      </el-tag>
                      <i class="el-icon-caret-right" />
                    </el-col>
                    <el-col :span="18">
                      <el-tag
                        v-for="(item3, i3) in item2.children"
                        :key="item3.id"
                        type="warning"
                        closable
                        @close="removeRightById(scope.row, item3.id)"
                      >
                        {{ item3.authName }}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <el-table-column
            type="index"
          />
          <el-table-column
            prop="roleName"
            label="角色名称"
          />
          <el-table-column
            prop="roleDesc"
            label="角色描述"
          />
          <el-table-column

            label="操作"
            width="300px"
          >
            <template v-slot="scope">
              <el-button
                type="primary"
                icon="el-icon-edit"
                size="mini"
                round
                @click="showEditDialog(scope.row.id)"
              />
              <el-button
                type="danger"
                icon="el-icon-delete"
                size="mini"
                round
                @click="delRole(scope.row.id)"
              />
              <el-tooltip
                effect="dark"
                content="分配权限"
                placement="top"
                :enterable="false"
              >
                <el-button
                  type="warning"
                  icon="el-icon-setting"
                  size="mini"
                  round
                  @click="showSetRightDialog(scope.row)"
                />
              </el-tooltip>
            </template>
          </el-table-column>
        </el-table>
      </div>
      <!-- 分页组件 -->
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        :rules="addFormRules"
        label-width="80px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="addForm.roleName" />
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="addForm.roleDesc" />
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="addRole"
        >确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        ref="editFormRef"
        :model="editForm"
        :rules="addFormRules"
        label-width="80px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="editForm.roleName" />
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="editForm.roleDesc" />
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editRole"
        >确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
    >
      <el-tree
        ref="treeRef"
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
      />
      <div slot="footer">
        <el-button @click="setRightDialogVisible = false">
          取 消
        </el-button>
        <el-button
          type="primary"
          @click="allotRights"
        >
          确 定
        </el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {

      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      // 分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 3, max: 30, message: '角色名长度在3~30个字符之间', trigger: 'blur' }
        ]
      },
      editForm: {},
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''

    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
      this.rolesList = res.data
      console.log(res)
    },
    async addRole () {
      // 先验证表单
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 验证通过可以发起提交数据请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败！')
        this.$message.success('添加角色成功！')
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('角色信息获取失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editRole () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.$message.success('修改角色信息成功！')
        this.editDialogVisible = false
        this.getRolesList()
      })
    },
    async delRole (id) {
      const confirmResult = await this.$confirm('是否确认删除该角色?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 点击确认返回字符串 ‘confirm’
      // 点击取消返回字符串 ‘cancel’
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除失败！')

      this.$message.success('删除成功！')
      this.getRolesList()
    },
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('是否确认删除该权限?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 点击确认返回字符串 ‘confirm’
      // 点击取消返回字符串 ‘cancel’
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除失败！')

      this.$message.success('删除成功！')
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
      this.rightsList = res.data
      // 获取已有权限前先清空defKeys数组
      this.defKeys = []
      this.getLeafkeys(role, this.defKeys)
      this.setRightDialogVisible = true
      console.log(this.rightsList)
    },
    // 通过递归形式获取当前角色的所有三级权限的id
    getLeafkeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafkeys(item, arr)
      })
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限成功！')

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;

}
.bdbottom {
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>
